A simple synthetic strategy for synthesis of new series of hetarylazo-heterocycles is described. The effects of solvent on their electronic absorption spectra were analyzed using Kamlet-Taft equation. The results of fitting coefficients indicated that the solvatochromism of the studied compounds is mainly due to the solvent polarity rather than the solvent basicity and acidity.

DFT calculations revealed that 1,8-diazanaphthalene di-N-oxides provide extraordinary oxygen superbases, whose gas-phase and acetonitrile basicities surpass those of classical naphthalene-based nitrogen proton sponges. Such high basicity is almost entirely a consequence of a large strain-induced destabilization in neutral forms, while only a small contribution is offered by the intramolecular [...

The macrocyclic amine, 1,5,9,18,22,26-hexaaza [11.11]-p-cyclophane (1) contains two dipropylenetriamine units which make the molecule highly basic. Owing to this basicity, 1 can be highly protonated in acidic media and can form supramolecular assemblies with different anions. Two new supramolecular structures arise from self-assembly of the salt of 1 with fumaric acid and of the N-methyl deriva...

Dioxapolyaza cyclophanes derived from resorcinol and different polyamine chains have been studied in aqueous solution as abiotic receptors for nucleotides. The presence of the additional ethyleneoxy subunits is reflected in a higher basicity and in a significant increase in the log K values for the interaction with nucleotides relative to that of related polyazacyclophanes.

In order to improve strategies for the design of spin-crossover materials, it is necessary develop and understand structure–property relationships, this best achieved by obtaining isostructural materials. work we synthesized a series four cocrystal solvates using [Fe(3-bpp)2][A]2 complex 2,2-dipyridyl disulfide coformer in methanol ethanol (A = BF4– or PF6–). The properties materials were deter...

To understand the thermodynamic characteristics of reaction between Al and SiO2 during continuous casting process high-aluminum steel, activity coefficients MnO in molten slags (18–43%) CaO-(33–64%) SiO2-(9–21%) Al2O3-(2–3%) MgO-(<2.4%) were measured at 1400°C, 1450°C 1500°C by experiments Si Mn equilibrium liquid copper slag graphite crucible under mixed gas atmosphere CO Ar. The effects SiO2,...

Treatment of the imine PhC(=NSiMe3)py with Et2BOMe or BF3·Et2O afforded bicyclic ketiminoboranes and via intramolecular N-coordination. The basicity of the imine N is evidenced by their reactivity towards Brønsted and Lewis acids and the structures of ·HCl and ·BF3 are reported as well as the dipyridyl imine derivative ·HCl.